Description (by @Otti2011): I actually wanted to make Tetris, but while I tried to make Tetris I had the idea to do this. You can decrease the amount of clones with the left button and increase the amount of clones with the right button. The Generate button is for generate a new shape. You can create every Tetris shape with this project!
Thanks to @Otti2011 for the original project, i just fixed one bug. Recently updated:)